A Quote by Anguttara Nikaya on sorrow, darkness, insight, light, and ending sorrow

In the gloom and darkness of the night, when there is a sudden flash of light, a person will recognize objects; in the same way, the one with a flash of insight sees according to reality--"This is how sorrow works; this is how it arises; this is how it can come to an end; this is the path leading to that end."